/**
  ******************************************************************************
  * @file      startup_stm32f401xe.s
  * @author    kyChu
  * @version   V1.0.0
  * @date      22-April-2019
  ******************************************************************************
  */

  .syntax unified
  .cpu cortex-m4
  .thumb

.global	g_pfnVectors
.global	Default_Handler

/* start address for the initialization values of the .data section.
defined in linker script */
.word	_sidata
/* start address for the .data section. defined in linker script */
.word	_sdata
/* end address for the .data section. defined in linker script */
.word	_edata
/* start address for the .bss section. defined in linker script */
.word	_sbss
/* end address for the .bss section. defined in linker script */
.word	_ebss

.equ  BootRAM,        0xF1E0F85F
/**
 * @brief  This is the code that gets called when the processor first
 *          starts execution following a reset event. Only the absolutely
 *          necessary set is performed, after which the application
 *          supplied main() routine is called.
 * @param  None
 * @retval : None
*/

    .section	.text.Reset_Handler
	.weak	Reset_Handler
	.type	Reset_Handler, %function
Reset_Handler:

/* Copy the data segment initializers from flash to SRAM */
  movs	r1, #0
  b	LoopCopyDataInit

CopyDataInit:
	ldr	r3, =_sidata
	ldr	r3, [r3, r1]
	str	r3, [r0, r1]
	adds	r1, r1, #4

LoopCopyDataInit:
	ldr	r0, =_sdata
	ldr	r3, =_edata
	adds	r2, r0, r1
	cmp	r2, r3
	bcc	CopyDataInit
	ldr	r2, =_sbss
	b	LoopFillZerobss
/* Zero fill the bss segment. */
FillZerobss:
	movs r3, #0
 	str  r3, [r2]
	adds r2, r2, #4

LoopFillZerobss:
	ldr	r3, = _ebss
	cmp	r2, r3
	bcc	FillZerobss

/* Call the clock system intitialization function.*/
    bl  SystemInit
/* Call static constructors */
    bl __libc_init_array
/* Call the application's entry point.*/
	bl	main

LoopForever:
    b LoopForever

.size	Reset_Handler, .-Reset_Handler

/**
 * @brief  This is the code that gets called when the processor receives an
 *         unexpected interrupt.  This simply enters an infinite loop, preserving
 *         the system state for examination by a debugger.
 *
 * @param  None
 * @retval : None
*/
    .section	.text.Default_Handler,"ax",%progbits
Default_Handler:
Infinite_Loop:
	b	Infinite_Loop
	.size	Default_Handler, .-Default_Handler
/******************************************************************************
*
* The vector table for a Cortex-M4F.  Note that the proper constructs
* must be placed on this to ensure that it ends up at physical address
* 0x0000.0000.
*
******************************************************************************/
 	.section	.isr_vector,"a",%progbits
	.type	g_pfnVectors, %object
	.size	g_pfnVectors, .-g_pfnVectors

g_pfnVectors:
	.word	_estack                          /* Top of Stack */
	.word	Reset_Handler                    /* Reset Handler */
	.word	NMI_Handler                      /* NMI Handler */
	.word	HardFault_Handler                /* Hard Fault Handler */
	.word	MemManage_Handler                /* MPU Fault Handler */
	.word	BusFault_Handler                 /* Bus Fault Handler */
	.word	UsageFault_Handler               /* Usage Fault Handler */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	SVC_Handler                      /* SVCall Handler */
	.word	DebugMon_Handler                 /* Debug Monitor Handler */
	.word	0                                /* Reserved */
	.word	PendSV_Handler                   /* PendSV Handler */
	.word	SysTick_Handler                  /* SysTick Handler */
        /* External Interrupts */
	.word	WWDG_IRQHandler                  /* Window WatchDog */
	.word	PVD_IRQHandler                   /* PVD through EXTI Line detection */
	.word	TAMP_STAMP_IRQHandler            /* Tamper and TimeStamps through the EXTI line */
	.word	RTC_WKUP_IRQHandler              /* RTC Wakeup through the EXTI line */
	.word	FLASH_IRQHandler                 /* FLASH */
	.word	RCC_IRQHandler                   /* RCC */
	.word	EXTI0_IRQHandler                 /* EXTI Line0 */
	.word	EXTI1_IRQHandler                 /* EXTI Line1 */
	.word	EXTI2_IRQHandler                 /* EXTI Line2 */
	.word	EXTI3_IRQHandler                 /* EXTI Line3 */
	.word	EXTI4_IRQHandler                 /* EXTI Line4 */
	.word	DMA1_Stream0_IRQHandler          /* DMA1 Stream 0 */
	.word	DMA1_Stream1_IRQHandler          /* DMA1 Stream 1 */
	.word	DMA1_Stream2_IRQHandler          /* DMA1 Stream 2 */
	.word	DMA1_Stream3_IRQHandler          /* DMA1 Stream 3 */
	.word	DMA1_Stream4_IRQHandler          /* DMA1 Stream 4 */
	.word	DMA1_Stream5_IRQHandler          /* DMA1 Stream 5 */
	.word	DMA1_Stream6_IRQHandler          /* DMA1 Stream 6 */
	.word	ADC_IRQHandler                   /* ADC1 */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	EXTI9_5_IRQHandler               /* External Line[9:5]s */
	.word	TIM1_BRK_TIM9_IRQHandler         /* TIM1 Break and TIM9 */
	.word	TIM1_UP_TIM10_IRQHandler         /* TIM1 Update and TIM10 */
	.word	TIM1_TRG_COM_TIM11_IRQHandler    /* TIM1 Trigger and Commutation and TIM11 */
	.word	TIM1_CC_IRQHandler               /* TIM1 Capture Compare */
	.word	TIM2_IRQHandler                  /* TIM2 */
	.word	TIM3_IRQHandler                  /* TIM3 */
	.word	TIM4_IRQHandler                  /* TIM4 */
	.word	I2C1_EV_IRQHandler               /* I2C1 Event */
	.word	I2C1_ER_IRQHandler               /* I2C1 Error */
	.word	I2C2_EV_IRQHandler               /* I2C2 Event */
	.word	I2C2_ER_IRQHandler               /* I2C2 Error */
	.word	SPI1_IRQHandler                  /* SPI1 */
	.word	SPI2_IRQHandler                  /* SPI2 */
	.word	USART1_IRQHandler                /* USART1 */
	.word	USART2_IRQHandler                /* USART2 */
	.word	0                                /* Reserved */
	.word	EXTI15_10_IRQHandler             /* External Line[15:10]s */
	.word	RTC_Alarm_IRQHandler             /* RTC Alarm (A and B) through EXTI Line */
	.word	OTG_FS_WKUP_IRQHandler           /* USB OTG FS Wakeup through EXTI line */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	DMA1_Stream7_IRQHandler          /* DMA1 Stream7 */
	.word	0                                /* Reserved */
	.word	SDIO_IRQHandler                  /* SDIO */
	.word	TIM5_IRQHandler                  /* TIM5 */
	.word	SPI3_IRQHandler                  /* SPI3 */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	DMA2_Stream0_IRQHandler          /* DMA2 Stream 0 */
	.word	DMA2_Stream1_IRQHandler          /* DMA2 Stream 1 */
	.word	DMA2_Stream2_IRQHandler          /* DMA2 Stream 2 */
	.word	DMA2_Stream3_IRQHandler          /* DMA2 Stream 3 */
	.word	DMA2_Stream4_IRQHandler          /* DMA2 Stream 4 */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	OTG_FS_IRQHandler                /* USB OTG FS */
	.word	DMA2_Stream5_IRQHandler          /* DMA2 Stream 5 */
	.word	DMA2_Stream6_IRQHandler          /* DMA2 Stream 6 */
	.word	DMA2_Stream7_IRQHandler          /* DMA2 Stream 7 */
	.word	USART6_IRQHandler                /* USART6 */
	.word	I2C3_EV_IRQHandler               /* I2C3 event */
	.word	I2C3_ER_IRQHandler               /* I2C3 error */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	FPU_IRQHandler                   /* FPU */
	.word	0                                /* Reserved */
	.word	0                                /* Reserved */
	.word	SPI4_IRQHandler                  /* SPI4 */

/*******************************************************************************
*
* Provide weak aliases for each Exception handler to the Default_Handler.
* As they are weak aliases, any function with the same name will override
* this definition.
*
*******************************************************************************/

  	.weak	NMI_Handler
	.thumb_set NMI_Handler,Default_Handler

  	.weak	HardFault_Handler
	.thumb_set HardFault_Handler,Default_Handler

  	.weak	MemManage_Handler
	.thumb_set MemManage_Handler,Default_Handler

  	.weak	BusFault_Handler
	.thumb_set BusFault_Handler,Default_Handler

	.weak	UsageFault_Handler
	.thumb_set UsageFault_Handler,Default_Handler

	.weak	SVC_Handler
	.thumb_set SVC_Handler,Default_Handler

	.weak	DebugMon_Handler
	.thumb_set DebugMon_Handler,Default_Handler

	.weak	PendSV_Handler
	.thumb_set PendSV_Handler,Default_Handler

	.weak	SysTick_Handler
	.thumb_set SysTick_Handler,Default_Handler

	.weak WWDG_IRQHandler
	.thumb_set WWDG_IRQHandler,Default_Handler

	.weak PVD_IRQHandler
	.thumb_set PVD_IRQHandler,Default_Handler

	.weak TAMP_STAMP_IRQHandler
	.thumb_set TAMP_STAMP_IRQHandler,Default_Handler

	.weak RTC_WKUP_IRQHandler
	.thumb_set RTC_WKUP_IRQHandler,Default_Handler

	.weak FLASH_IRQHandler
	.thumb_set FLASH_IRQHandler,Default_Handler

	.weak RCC_IRQHandler
	.thumb_set RCC_IRQHandler,Default_Handler

	.weak EXTI0_IRQHandler
	.thumb_set EXTI0_IRQHandler,Default_Handler

	.weak EXTI1_IRQHandler
	.thumb_set EXTI1_IRQHandler,Default_Handler

	.weak EXTI2_IRQHandler
	.thumb_set EXTI2_IRQHandler,Default_Handler

	.weak EXTI3_IRQHandler
	.thumb_set EXTI3_IRQHandler,Default_Handler

	.weak EXTI4_IRQHandler
	.thumb_set EXTI4_IRQHandler,Default_Handler

	.weak DMA1_Stream0_IRQHandler
	.thumb_set DMA1_Stream0_IRQHandler,Default_Handler

	.weak DMA1_Stream1_IRQHandler
	.thumb_set DMA1_Stream1_IRQHandler,Default_Handler

	.weak DMA1_Stream2_IRQHandler
	.thumb_set DMA1_Stream2_IRQHandler,Default_Handler

	.weak DMA1_Stream3_IRQHandler
	.thumb_set DMA1_Stream3_IRQHandler,Default_Handler

	.weak DMA1_Stream4_IRQHandler
	.thumb_set DMA1_Stream4_IRQHandler,Default_Handler

	.weak DMA1_Stream5_IRQHandler
	.thumb_set DMA1_Stream5_IRQHandler,Default_Handler

	.weak DMA1_Stream6_IRQHandler
	.thumb_set DMA1_Stream6_IRQHandler,Default_Handler

	.weak ADC_IRQHandler
	.thumb_set ADC_IRQHandler,Default_Handler

	.weak EXTI9_5_IRQHandler
	.thumb_set EXTI9_5_IRQHandler,Default_Handler

	.weak TIM1_BRK_TIM9_IRQHandler
	.thumb_set TIM1_BRK_TIM9_IRQHandler,Default_Handler

	.weak TIM1_UP_TIM10_IRQHandler
	.thumb_set TIM1_UP_TIM10_IRQHandler,Default_Handler

	.weak TIM1_TRG_COM_TIM11_IRQHandler
	.thumb_set TIM1_TRG_COM_TIM11_IRQHandler,Default_Handler

	.weak TIM1_CC_IRQHandler
	.thumb_set TIM1_CC_IRQHandler,Default_Handler

	.weak TIM2_IRQHandler
	.thumb_set TIM2_IRQHandler,Default_Handler

	.weak TIM3_IRQHandler
	.thumb_set TIM3_IRQHandler,Default_Handler

	.weak TIM4_IRQHandler
	.thumb_set TIM4_IRQHandler,Default_Handler

	.weak I2C1_EV_IRQHandler
	.thumb_set I2C1_EV_IRQHandler,Default_Handler

	.weak I2C1_ER_IRQHandler
	.thumb_set I2C1_ER_IRQHandler,Default_Handler

	.weak I2C2_EV_IRQHandler
	.thumb_set I2C2_EV_IRQHandler,Default_Handler

	.weak I2C2_ER_IRQHandler
	.thumb_set I2C2_ER_IRQHandler,Default_Handler

	.weak SPI1_IRQHandler
	.thumb_set SPI1_IRQHandler,Default_Handler

	.weak SPI2_IRQHandler
	.thumb_set SPI2_IRQHandler,Default_Handler

	.weak USART1_IRQHandler
	.thumb_set USART1_IRQHandler,Default_Handler

	.weak USART2_IRQHandler
	.thumb_set USART2_IRQHandler,Default_Handler

	.weak EXTI15_10_IRQHandler
	.thumb_set EXTI15_10_IRQHandler,Default_Handler

	.weak RTC_Alarm_IRQHandler
	.thumb_set RTC_Alarm_IRQHandler,Default_Handler

	.weak OTG_FS_WKUP_IRQHandler
	.thumb_set OTG_FS_WKUP_IRQHandler,Default_Handler

	.weak DMA1_Stream7_IRQHandler
	.thumb_set DMA1_Stream7_IRQHandler,Default_Handler

	.weak SDIO_IRQHandler
	.thumb_set SDIO_IRQHandler,Default_Handler

	.weak TIM5_IRQHandler
	.thumb_set TIM5_IRQHandler,Default_Handler

	.weak SPI3_IRQHandler
	.thumb_set SPI3_IRQHandler,Default_Handler

	.weak DMA2_Stream0_IRQHandler
	.thumb_set DMA2_Stream0_IRQHandler,Default_Handler

	.weak DMA2_Stream1_IRQHandler
	.thumb_set DMA2_Stream1_IRQHandler,Default_Handler

	.weak DMA2_Stream2_IRQHandler
	.thumb_set DMA2_Stream2_IRQHandler,Default_Handler

	.weak DMA2_Stream3_IRQHandler
	.thumb_set DMA2_Stream3_IRQHandler,Default_Handler

	.weak DMA2_Stream4_IRQHandler
	.thumb_set DMA2_Stream4_IRQHandler,Default_Handler

	.weak OTG_FS_IRQHandler
	.thumb_set OTG_FS_IRQHandler,Default_Handler

	.weak DMA2_Stream5_IRQHandler
	.thumb_set DMA2_Stream5_IRQHandler,Default_Handler

	.weak DMA2_Stream6_IRQHandler
	.thumb_set DMA2_Stream6_IRQHandler,Default_Handler

	.weak DMA2_Stream7_IRQHandler
	.thumb_set DMA2_Stream7_IRQHandler,Default_Handler

	.weak USART6_IRQHandler
	.thumb_set USART6_IRQHandler,Default_Handler

	.weak I2C3_EV_IRQHandler
	.thumb_set I2C3_EV_IRQHandler,Default_Handler

	.weak I2C3_ER_IRQHandler
	.thumb_set I2C3_ER_IRQHandler,Default_Handler

	.weak FPU_IRQHandler
	.thumb_set FPU_IRQHandler,Default_Handler

	.weak SPI4_IRQHandler
	.thumb_set SPI4_IRQHandler,Default_Handler

	.weak	SystemInit

/* --------------------------- END OF FILE --------------------------- */
